Force feed grease seal for storage batteries



May 22 1934.

F. q. BEETEM FORCE FEED GREASE SEAL FOR STORAGE BATTERIES Filed Feb. 12.1951 Mnva'ss:

' 4 [rm/mm Patented May 22, 1934 UNITED STATES PATENT ol-"rlcs FORCEFEED GREASE SEAL FOR STORAGE BATTERIES Application February 12, 1931,Serial No. 515,357

5 Claims.

My improved device consists of a force feed grease seal for storagebatteries or means for filling the spaces between the terminal post andthe cover of a storagebattery cell with grease or similar acid resistantand semi-fluid substance to prevent the escape of acid from the cell bycapillary creepage.

For a further description-of my invention reference may be had to theannexed drawing and specification at the end whereof my invention willbe specifically pointed out and claimed.

In the drawing,

The single figure is a vertical elevation of my device with parts brokenaway.

In the embodiment of my invention, chosen for illustration in thedrawing, there is disclosed a cell cover 1 for a storage battery cell.Cell cover 1 has boss 2 depending from its lower surface and boss 3having groove 4 therein projecting from its upper surface.

Through an orifice in cell cover 1 projects a terminal post 5 having inits central portion a hollow chamber generally indicated as 6. Terminalpost 5 also has a projecting flange 8 having a shoulder 9 thereon.Flange 8 and shoulder 9 cooperate with boss 2 on cover 1. From hollowchamber 6 there extend to the outer walls of terminal post 5 horizontalpassages '7 which are located to open into the annular spaces 16 and 17between the outer walls of the post and the opening in the cover. In thewalls of chamber 6 post 5 may, if desired, be provided with an insert 10or brass or othersuitable material; The walls of chamber 6 or of insert10, if such an insert is used, are provided with screw threads.

Cooperating with the screw threads in .the Walls of chamber 6 isterminal screw or bolt 11 which is adapted when adjusted to innerposition to occupy substantially all of chamber 6.

On its outer surface terminal post 5 is provided with screw threads 12'with which cooperate post nut 13. Post nut 13 carries on its lowersurface flange 1-4 which is of substantially the same diameter or shapeas groove 4. Post nut 13 may have on its lower surface grooves orchannels 18 down post nut 13 on post 5. Chamber 6 is filled with greaseor other acid resistant and semi-fluid substance. Terminal 15 is slippedon terminal screw 11 which is entered on the threads in the wall ofchamber 6. Terminal screw 11 is then adjusted to clamp terminal 15against terminal post 5. At the same time inward movement of terminalscrew 11 forces the grease out of chamber 6 through the passages 7 anddown into space 17 between flange 8 and boss 2 and up into space 16 andalso into the spaces between terminal nut 13 and the threads 12. It willthus be seen that the spaces between terminal post 5 and cell cover 1are completely filled with a semifluid substance and thus the escape ofacid from the cell by capillary creepage is prevented.

I do not intend to be limited in the practice of my invention save asthe scope'of the prior art and of the attached claims may require.

I claim:

1. A storage battery terminal post structure including a cell coverhaving an opening therein, a terminal post projecting through saidopening and having a chamber therein and having thereinv a permanentlyopen passage from said chamber to the outer wall of said post at thelevel of said cover, an acid resistant, semi-fluid substance in saidchamber, a post nut having engagement with said terminal post to clampsaid cell cover against said post, and a terminal screw havingengagement with the walls of said chamber to clamp a terminal to saidpost and to force out said substance from said chamber through saidpassage into the space between said terminal post and said cell coverand said post nut.

2. A storage battery terminal post structure including a cell coverhaving an opening therein, a terminal post prcjecting through saidopening and having an imperiorate upper wall defining a screw threadedchamber therein and having therein a lateral passage extending from thelower part of said chamber to the outer wall of said post at the levelof said cover, an acid resistant, semi-fluid substance in ,said chamber,a post nu-t having engagement with said terminal post to clamp said cellcover against said post and a terminal screw having engagement with thescrew threads of said chamber to clamp a terminal to said post and toforce out said substance from said chamber through said passage into thespace between said terminal post, said cell cover, and said post nut.

3. A storage battery terminal post structure including a cell coverhaving an opening therein, a boss on said cell cover surrounding saidopening and having a groove in its upper surface, a terminal postprojecting through said opening and having at its upper end animperforate wall defining a screw threaded chamber within said post andhaving therein a laterally extending passage leading from the lower partof said chamber to the outer wall of said post at the level of saidcover, an acid resistant, semi-fluid substance in said chamber, a postnut having engagement with said terminal post to clamp said cell coveragainst said post and having a flange thereon cooperating with saidgroove in said boss, and a terminal screw having engagement with thescrew threads of said chamber to clamp a terminal to said post and toforce out said substance from said chamber through said passage into thespace between said terminal post, said cell cover and said post nut.

4;. A storage battery terminal post structure including a cell coverhaving an opening therein, a terminal post projecting through saidopening and having at its upper end an imperforate wall defining achamber in said post and having therein a lateral passage extending fromthe lower part of said chamber to the outer wall of said post at thelevel of said cover, a flange on the outer surface of said post beneathsaid passage, an acid resistant, semi-fluid substance in said chamber,a. post nut having engagement with said terminal post to clamp said cellcover against said flange on said post, and a terminal screw havingengagement with the walls of said chamber to clamp a terminal to saidpost and to force out said substance from said chamber through saidpassage into the space between said terminal post, said cell cover, andsaid post nut. 1

a semi-fluid sealing substance in said chamber,

and a terminal screw completely closing the open end of said chamber andmovable to enter said chamber and extrude said sealing substancetherefrom through said passage into the space between said terminal postand said cover.

FRANK G. BEETEM.

